Battery consumption is the top complaint among most mobile phone users, whose devices always seem to run out of juice at the most inopportune time.

Assuming the images are the real deal, would that mean we could expect longer life per charge from the iPhone 6? Not necessarily.

The next-generation iPhone will reportedly feature a larger, 4.7-inch screen, a beefier processor, and other features that would be welcomed by consumers. But a bigger screen alone will drain more juice from the battery than does the 5S with its 4-inch screen, meaning a single battery charge may offer the same amount of life despite its higher capacity.

Of course, Apple and other mobile players are always seeking ways to shrink battery consumption, so perhaps the iPhone 6 will surprise us with new battery-saving technology. Otherwise, don't expect any miracles in battery life from the new phone.

Samsung's Galaxy S5 houses a 2,800 mAh battery. In a video spot released earlier this month, Samsung even trashed Apple by dubbing iPhone users "wall huggers" who must always hover near a wall outlet or charger to keep their phones alive.

Apple is expected to unveil the 4.7-inch iPhone in September. A second iPhone with a 5.5-inch screen is also reportedly on tap, though rumored production problems may delay the launch of Apple's first "phablet."